The baby gorilla left in her care grows up to become a hugely tall and broad specimen by the name of Joe, living in the mountains as a mostly unseen legend among people who live there. Along comes an eco-minded emissary from a California sanctuary, who talks the jungle girl into providing safe haven for Joe at the L.A. facility. The transition is not without discomfort, but everything is aggravated via a conspiracy of poachers to get Joe into their own greedy hands!